Sometimes my van gets an oscillating wobble when at medium speeds.   When
passing or getting passed by a big truck is another time when it happens  but
not all the time.  I have had all the suspension parts renewed and the
wheels balanced and alignment checked.  My front tires have worn badly on  the
outside edges.  I am not in California anymore and have not been able  to
find the root of the problem.  My mechanic thinks my wheels may be out  of
true.  I plan on rotating my wheels front to rear to see if it changes
anything but do not believe that to be the problem.  I would really like to  get
this sorted out before I buy 5 new tires and if needed rims.

Any ideas?

Thanks,

Pat
in SC